503 Service Unavailable

[garthk]

Seen on datasette.io and datasette.io/simonwillisonblog. Not 100% reproducible. Given that, presumably unrelated to simonw/simonwillisonblog#321.

curl -v https://datasette.io/simonwillisonblog output

```plain * Trying [2001:4860:4802:38::15]:443... * Connected to datasette.io (2001:4860:4802:38::15) port 443 (#0) * ALPN: offers h2 * ALPN: offers http/1.1 * CAfile: /etc/ssl/cert.pem * CApath: none * (304) (OUT), TLS handshake, Client hello (1): * (304) (IN), TLS handshake, Server hello (2): * (304) (IN), TLS handshake, Unknown (8): * (304) (IN), TLS handshake, Certificate (11): * (304) (IN), TLS handshake, CERT verify (15): * (304) (IN), TLS handshake, Finished (20): * (304) (OUT), TLS handshake, Finished (20): * SSL connection using TLSv1.3 / AEAD-CHACHA20-POLY1305-SHA256 * ALPN: server accepted h2 * Server certificate: * subject: CN=datasette.io * start date: Feb 26 09:34:49 2023 GMT * expire date: May 27 09:34:48 2023 GMT * subjectAltName: host "datasette.io" matched cert's "datasette.io" * issuer: C=US; O=Let's Encrypt; CN=R3 * SSL certificate verify ok. * Using HTTP2, server supports multiplexing * Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0 * h2h3 [:method: GET] * h2h3 [:path: /simonwillisonblog] * h2h3 [:scheme: https] * h2h3 [:authority: datasette.io] * h2h3 [user-agent: curl/7.86.0] * h2h3 [accept: */*] * Using Stream ID: 1 (easy handle 0x120013400) > GET /simonwillisonblog HTTP/2 > Host: datasette.io > user-agent: curl/7.86.0 > accept: */* > < HTTP/2 503 < x-cloud-trace-context: c107bfa96a58eb8f39e940b25a823831;o=1 < date: Wed, 08 Mar 2023 09:33:36 GMT < content-type: text/html < server: Google Frontend < content-length: 19 < * Connection #0 to host datasette.io left intact Service Unavailable ```

[simonw]

Yikes! Thanks for reporting.

[simonw]

Closing this to do the work here:

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